6026-02-4Relevant articles and documents
Aminosilyl-Substituted Diarylethene Compounds for Anionic Polymerisation
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Paragraph 0183-0188, (2017/08/07)
The invention related to novel compounds useful as modifying monomers and precursors for polymerization initiators. The invention further relates to a method of making the polymerization initiators and resulting polymers. The invention also relates to pol
Flexible stereoselective functionalizations of ketones through umpolung with hypervalent iodine reagents
Mizar, Pushpak,Wirth, Thomas
supporting information, p. 5993 - 5997 (2014/06/10)
The functionalization of carbonyl compounds in the α-position has gathered much attention as a synthetic route because of the wide biological importance of such products. Through polarity reversal, or "umpolung", we show here that typical nucleophiles, such as oxygen, nitrogen, and even carbon nucleophiles, can be used for addition reactions after tethering them to enol ethers. Our findings allow novel retrosynthetic planning and rapid assembly of structures previously accessible only by multistep sequences. A Nu approach: An efficient α-functionalization of ketones with a range of simple and useful nucleophiles is possible by using hypervalent iodine reagents (see scheme; Nu′ can be the Nu itself or a protected form of this nucleophile group).
Selective synthesis of functional alkynylmono- and -trisilanes
Hoffmann, Florian,Wagler, Joerg,Roewer, Gerhard
scheme or table, p. 1133 - 1142 (2010/06/20)
The selective synthesis of functional alkynylsllanes RC=C(SiMe 2)m,-X (m = 1, 3) was investigated. Monofunctionalization with or without protecting groups gave moderate to good yields of alkynyldimethylmonosilanes RC=CMe2SiX [R = Ph, X = Cl. (1), NEt 2 (2), OMe (3), H (4), Br (5), I (6), Cp (8), C5H 4Li (10), Ph (11); R = Pr, X = Ph (12)]. Compounds 4 and 8 were converted into the (alkyne)transition-metal complexes 4-Cp2Mo 2(CO)4 (13) and 8-Co2(CO)6 (14), respectively, which were characterized by X-ray diffraction. Stepwise extension and functionalization of the silane chain starting from 1chloro-2-(diethylamino) tetramethyldisilane (Et2NMe2Si-SiMe2Cl) yielded the trisilanes Ph-(SiMe2J3-X [X = NEt2 (18), OMe (19), Cl (20), H (21), C=CPh (22), C=CPr (23)]. The synthesized compounds were characterized by NMR and IR spectroscopy, 4, 11, 13, and 14 also by UV/Vis spectroscopy.